Fluorohydrocarbon elastomers
Abstract
Abstract A FLUOROHYDROCARBON ELASTOMER COMPOSITION HAVING IMPROVED LOW TEMPERATURE PROPERTIES IS PROVIDED BY INCLUDING IN THE COMPOSITION AS PLASTICIZER A FLUOROSILICONE POLYMER WHICH HAS BEEN MODIFIED BY TREATMENT WITH AN AMINE COMPOUND OF FORMULA H2N(R.NH)NH, WHERE R IS A DIVALENT LOWER ALKANE CHAIN CONTAINING NOT MORE THAN EIGHT CARBON ATOMS, AND N IS AN INTEGER FROM ONE TO FIVE, AN AN ORGANIC PEROXIDE FREE RADICAL SOURCE, TO HAVE A SPECIFIC VISCOSITY IN THE RANGE 0.03 TO 0.06. PREFERABLY THE AMINE COMPOUND IS TRIETHYLENE TETRAMINE AND THE ORGANIC PEROXIDE FREE RADICAL SOURCE IS 2.5-DIMETHYL-2,5-DITERTIARY BUTYLPEROXYHEXANE. IN A TYPICAL EXAMPLE THE CLASH AND BERG TEMPERATURE OF A TYPICAL VINYLDENE FLUORIDE/HEXAFLUOROPROPYLENE COPOLYMER IS REDUCED FROM -17* C. TO -32* C.
Inventors
- 👤 J Day
- 👤 D Thomas
Bibliographic Details
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